#version 320 es
precision highp float;

layout(location = 0) in vec2 aPos;
layout(location = 1) in vec2 aTexCoord;
out vec2 texCoord;

void main() {
    gl_Position = vec4(aPos, 0.0, 1.0);
    texCoord = aTexCoord; // 此时 texCoord 已正确定义
}
